Na h-Eileanan Siar · Scotland
Sand Mastic in Geirinis
Our applicators work in Geirinis on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly.
- Open joints round the window box
- Crumbling sand mastic round a window
- Patchy fillers round a sash window
DIY versus a professional finish
If you’ve already had a go yourself, that’s fine. We cut it out and start again.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
How we handle sand mastic in Geirinis
For a listed home or one in a conservation area, ask your local planning authority whether consent is needed for work to windows. Like-for-like sand mastic is often the preferred finish. Common call-outs are for window mastic to renew ahead of painting and failed mastic on an exposed elevation, on period & listed homes, timber door frames and tenement windows.
Across smaller places in Scotland, homes range from stone and harled cottages to newer houses, many standing in the open. Exposed frames and sills take the full force of wind-driven rain, so the mastic there works hard.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Geirinis (HS8)
- Region
- Na h-Eileanan Siar
- Cover
- One year on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Why act early in Geirinis
Draughts round a sash window are not always the sashes. Gaps between the frame and the wall can be just as bad, and renewing the mastic closes them. Exposed walls in smaller Scottish places take a lot of wind and rain, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
The cost depends on the amount of work, how much old material has to come out and how easy the joints are to reach. We give a clear quote before we start, so you know where you stand.
Why choose Mr Mastic in Geirinis
- Approved under the ARBOMaster scheme
- Any old sealant cut out fully, not covered over
- Anti-fungal sanitary silicone in wet areas
- Fully insured
Take a look at what affects the cost and our reviews.
Geirinis homes and the weather
Geirinis is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. Work on the islands has to be planned around ferry crossings and the weather, so the more notice, the better.
In and around Geirinis, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint. For jobs in and around Geirinis, choosing the right material for each joint is as important as a tidy finish.
Geirinis (Gaelic: Gerinish) is in Na h-Eileanan Siar. Whether you are in the middle of Geirinis or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Geirinis is one of 87 towns and villages in Na h-Eileanan Siar we cover.
Jobs for sand mastic in HS8 works the same way as everywhere else we cover. We cover properties on Cille Bha'nain and Dun Mor and the roads around them. Neighbouring places we cover for sand mastic include Creag Ghoraidh (4 miles north), Grimsay (5 miles north-east), Balivanich (8 miles north), Baile a' Mhanaich (8 miles north) and Dalabrog (13 miles south). For island and remote addresses, the job takes a little more planning, so let us know when you get in touch.
Near you in Geirinis
Open spaces near Geirinis include Loch Bee and Ben Tarbert.
FAQs for Geirinis
Can you do sand mastic in Geirinis?
Yes. We work across all of Scotland, and Geirinis is part of that. Just email us at info@mrmastic.co.uk with a few details of the job.
Does living near the coast affect sand mastic in Geirinis?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are usually the first to need attention.
How do I get a quote for sand mastic in Geirinis?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote and we’ll talk you through it.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
Can I paint the new mastic?
It’s traditionally left unpainted, which is what traditional guidance recommends. Ask us before decorating.
What information do you need?
Only a few details: the address or postcode, what’s wrong and any access issues. Then email us at info@mrmastic.co.uk.
How long will you be here?
Most jobs take a few hours per window, depending on the condition of the joints, including preparation and clearing up. We will confirm how long when we quote.
Where are you based?
We’re a Crawley-based firm. Our area covers South East England, London and Scotland.
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. Our tips:
- Take care around the mastic when scraping paint
- Renew mastic before redecorating the windows
- Do not run silicone over sand mastic
- Don’t paint over the new mastic
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
Small cracks are a sign the mastic is ageing. It’s easier to renew it before it drops out.
Nearby places to Geirinis
Also in Geirinis
Landlord and commercial work in Geirinis
Landlords and agents in Geirinis can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
How the job changes by surface
Period and listed homes
Sand mastic is the like-for-like choice for many period homes. On listed buildings, check with your planning authority first.
Tenement and terrace windows
Upper-floor windows need access planning. Let us know the floor and we will confirm access.
What we can’t put right
Some problems need a builder, plumber or other trade rather than us:
- Timber that has rotted
- Sashes that rattle, stick or won’t open
- Damaged stone surrounds
If in doubt, send an email to info@mrmastic.co.uk and we’ll say what we think before booking.
What we seal
- Tenement windows
- Sash and case windows
- Period & listed homes
- Stone surrounds
- Timber door frames
- Brick reveals
What happens on the day
There’s no need to move everything out before we come, only the area right around the joints. Everything nearby is protected, and the work takes a few hours for a single window, longer for several for a typical job. Around Geirinis, distance and access matter more than parking. Tell us how to find the property and how to reach the work.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Clear items away from the joints we are working on
- Let us know if you’ve seen damp or leaks
Get a quote
Every job is quoted individually. Just drop us a line at info@mrmastic.co.uk with the details and send pictures if you have them.